Java Utililty Methods Byte Array from

byte[] byteArray = new byte[1];
byteArray[0] = value;
return byteArray;

byte[] b = new byte[buffer.length - offset];
System.arraycopy(buffer, offset, b, 0, buffer.length - offset);
return b;

ByteArrayOutputStream result = new ByteArrayOutputStream();
try (InputStream in = getResourceAsStrem(getBytecodeRelativePath(clazz))) {
    byte[] buffer = new byte[1024];
    for (int read = in.read(buffer); read > -1; read = in.read(buffer)) {
        result.write(buffer, 0, read);
return result.toByteArray();
...

String resourcePath = clazz.getName().replace('.', '/') + ".class";
ClassLoader loader = clazz.getClassLoader();
InputStream in;
if (loader == null) {
    in = ClassLoader.getSystemResourceAsStream(resourcePath);
} else {
    in = loader.getResourceAsStream(resourcePath);
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte[] buf = new byte[100];
while (true) {
    int len = in.read(buf);
    if (len < 0) {
        break;
    out.write(buf, 0, len);
in.close();
return out.toByteArray();

java.io.InputStream is = cls.getResourceAsStream(resourceName);
try {
    return getBytes(is);
} finally {
    is.close();

ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int a = 0;
while ((a = is.read(buffer)) != -1) {
    baos.write(buffer, 0, a);
baos.close();
buffer = null;
...

ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    try {
        oos.writeObject(obj);
    } finally {
        oos.close();
} finally {
    bos.close();
return bos.toByteArray();

if (data == null) {
    throw new IllegalArgumentException("data may not be null");
if (charset == null || charset.length() == 0) {
    throw new IllegalArgumentException("charset may not be null or empty");
try {
    return data.getBytes(charset);
...

if (data == null) {
    throw new IllegalArgumentException("data may not be null");
if (charset == null || charset.length() == 0) {
    throw new IllegalArgumentException("charset may not be null or empty");
try {
    return data.getBytes(charset);
...

if (null == value) {
    return EMPTY_BUFFER;
return value.getBytes(characterEncoding);